Use Of Estimates (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Accrued Expenses
Employee benefits	$ 211.0	$ 217.8
Unearned revenue	516.5	501.7
Warranty	53.3	45.6	43.7
Other	310.6	315.0
Total	1,091.4	1,080.1
Analysis of product warranty accrual
Balance at beginning of period	55.8	56.7	58.8
Acquisitions	8.6	1.7	3.6
Provisions	26.9	26.9	24.0
Usage	(26.2)	(29.5)	(29.7)
Balance at end of period	65.1	55.8	56.7
Less: Current portion of warranty	53.3	45.6	43.7
Non-current portion of warranty	11.8	10.2	13.0
Allowance for Doubtful Accounts
Accounts Receivable Allowances
Balance at beginning of year	56.8	60.2	62.4
Acquisitions	1.3	1.2	0.2
Allowances provided	19.3	17.7	14.4
Write-offs, net of recoveries and credits issued	(24.4)	(22.3)	(16.8)
Balance at end of year	$ 53.0	$ 56.8	$ 60.2